Freeman Miller, M.D., is an orthopedic surgeon and assistant professor of orthopedic surgery at Jefferson Medical College in Philadelphia. Steven J. Bachrach, M.D., is a pediatrician and clinical professor of pediatrics at Jefferson Medical College. They are co-directors of the Cerebral Palsy Program at the duPont Hospital for Children of the A. I. du Pont Institute of the Nemours Foundation in Wilmington.